Rumour has it this is the 2010 yz 450f

[barty5]

They have yet to update the silencer, looks the same as it did ten years ago.

they did in 08 but had to go back due to noise levels.

[flyingcr250]

Ok a pretty good source over at thumper says this is the 2010 yz450f .... With fuel injection at the front of engine, exhaust straught out the rear of the head, cast alloy bolt together frame ,electronicaly controlled rear shock,

Dunno may just be rumour but a pretty cool concept

OOOPPPS just read MR YAMAHA Isnt happy about pics getting out so have removed them

ooooohhhh weres the pics???

[Taz]

Looks good....

[honda_power]

looks pretty good, if its light its going to be a sweet bike

hope they do something to the yz's... doubt it though

[xwhatsit]

I suppose it's something you can do with a watercooled bike. I've always wondered why bikes weren't build like this from the beginning... I suppose the reason being that it's next to impossible to cool the exhaust valves if they're behind the airstream.

[honda_power]

it would cook the shock wouldnt it?

[noobi]

what would be the advantage of putting the inlet/exhaust the other way around? the fuel tank would be in the middle so better weight distribution anything else?

[camchain]

Cannondale (Mtn Bike maker?) made an engine with this layout a while ago. I don't think they made very many before going bust.

[Taz]

It's not a new idea.... Nothing is really, it's all been tried brfore. Some guys used to turn the heads around on their triumphs also.

[MikeJ]

Nothing new with this design. The Cannondale Bicycle Company branched out into motorcycles and produced a MXer in 1999 with EFI from the front and a rear exhaust plus other features. The company went bust in 2003 and was bought by ATK. ATK now sell an upgraded version of the original design.
http://www.atkmotorsports.com/rider%...usa/atk450.jpg

[cheese]

That ATK bike is the ugliest bike I've ever seen.

[laserracer]

Have to agree with CHEESE wouldnt win any beauty contests..as for that curvy frame..notice how that hasn't become the standard

[clmintie]

Have to agree with CHEESE wouldnt win any beauty contests..as for that curvy frame..notice how that hasn't become the standard

Only be a couple of years until bikes won't look anything like today's standard..... Bring it on, I love watching the future arrive in a full on skid, yelling yea ha.....

[oldguy]

Looks good, yamaha have done the reverse cylinder before with reasonable success, on their TZR250 3MA motor for all you 2stroke fans.
thou it is a road bike haha.

looking at the pic they have got the exhaust sorted by throwing a small loop in just to get the length.

[Armitage Shanks]

Any 'Newsflash' on when they might have the simplicity, reliabilty and 65 hps of the old 500's ?

Just curious ....seems it's all going arse about face to me